The American cockroach is commonly found in basements and steam tunnels of restaurants, bakeries, food-processing facilities, and grocery stores.
When indoors, the nymphs and adults are usually found in dark, warm and moist areas (basements, bathtubs, dish washers, water drains, sewers).
Commonly found indoors with a perference to a warmer and more humid area. They can be found in bags, boxes, containers and even with used appliances. They move easily between apartment units using plumbing and pipes as their highways.
Females produce an average of 8 egg capsules, containing 16 eggs in each, from spring to mid-summer. Unlike other urban cockroaches, the Oriental roach produces only one generation per year where temperatures are cool in winter.
The older brown Oriental cockroach nymphs are very difficult to distinguish from the American cockroach nymphs.
In early spring, only adult Oriental cockroaches are found. By late spring, nymphs are abundant. As nymphal numbers increase, the adults die off and by August any adults are new ones. By fall, almost the entire population is adult.